After doing a firmware update to all of our HP printers, our HP DeskJet 2600 printers are getting a 6404 Firmware Error.

We cant get into the menu of the printer when it has the network card in it...

We can get into the menu of the printer when the network card is out...

ANY HELP? - Or do I now have a bunch of paperweights until I buy new HP JetDirect Cards?

Thanks in Advance,
Jeremy aka Raven